from __future__ import annotations

from collections import defaultdict
from enum import Enum
from typing import List, Dict, Set, Tuple, Optional, Iterable
from urllib.parse import urlparse

from ..utils.enums.source import SourcePages, SourceTypes
from ..utils.config import youtube_settings
from ..utils.string_processing import hash_url

from .metadata import Mapping, Metadata
from .parents import OuterProxy
from .collection import Collection


class Source(OuterProxy):
    url: str

    page_enum: SourcePages
    referer_page: SourcePages

    audio_url: str

    _default_factories = {
        "audio_url": lambda: None,
    }

    # This is automatically generated
    def __init__(self, page_enum: SourcePages, url: str, referer_page: SourcePages = None, audio_url: str = None,
                 **kwargs) -> None:

        if referer_page is None:
            referer_page = page_enum

        super().__init__(url=url, page_enum=page_enum, referer_page=referer_page, audio_url=audio_url, **kwargs)

    @classmethod
    def match_url(cls, url: str, referer_page: SourcePages) -> Optional["Source"]:
        """
        this shouldn't be used, unlesse you are not certain what the source is for
        the reason is that it is more inefficient
        """
        parsed = urlparse(url)
        url = parsed.geturl()
        
        if "musify" in parsed.netloc:
            return cls(SourcePages.MUSIFY, url, referer_page=referer_page)

        if parsed.netloc in [_url.netloc for _url in youtube_settings['youtube_url']]:
            return cls(SourcePages.YOUTUBE, url, referer_page=referer_page)

        if url.startswith("https://www.deezer"):
            return cls(SourcePages.DEEZER, url, referer_page=referer_page)
        
        if url.startswith("https://open.spotify.com"):
            return cls(SourcePages.SPOTIFY, url, referer_page=referer_page)

        if "bandcamp" in url:
            return cls(SourcePages.BANDCAMP, url, referer_page=referer_page)

        if "wikipedia" in parsed.netloc:
            return cls(SourcePages.WIKIPEDIA, url, referer_page=referer_page)

        if url.startswith("https://www.metal-archives.com/"):
            return cls(SourcePages.ENCYCLOPAEDIA_METALLUM, url, referer_page=referer_page)

        # the less important once
        if url.startswith("https://www.facebook"):
            return cls(SourcePages.FACEBOOK, url, referer_page=referer_page)

        if url.startswith("https://www.instagram"):
            return cls(SourcePages.INSTAGRAM, url, referer_page=referer_page)

        if url.startswith("https://twitter"):
            return cls(SourcePages.TWITTER, url, referer_page=referer_page)

        if url.startswith("https://myspace.com"):
            return cls(SourcePages.MYSPACE, url, referer_page=referer_page)

    def get_song_metadata(self) -> Metadata:
        return Metadata({
            Mapping.FILE_WEBPAGE_URL: [self.url],
            Mapping.SOURCE_WEBPAGE_URL: [self.homepage]
        })

    def get_artist_metadata(self) -> Metadata:
        return Metadata({
            Mapping.ARTIST_WEBPAGE_URL: [self.url]
        })

    @property
    def hash_url(self) -> str:
        return hash_url(self.url)

    @property
    def metadata(self) -> Metadata:
        return self.get_song_metadata()

    @property
    def indexing_values(self) -> List[Tuple[str, object]]:
        return [
            ('id', self.id),
            ('url', self.url),
            ('audio_url', self.audio_url),
        ]

    def __merge__(self, __other: Source, override: bool = False):
        if override:
            self.audio_url = __other.audio_url

        if self.audio_url is None or (override and __other.audio_url is not None):
            self.audio_url = __other.audio_url

    def __str__(self):
        return self.__repr__()

    def __repr__(self) -> str:
        return f"Src({self.page_enum.value}: {self.url}, {self.audio_url})"

    @property
    def title_string(self) -> str:
        return self.url

    page_str = property(fget=lambda self: self.page_enum.value)
    type_str = property(fget=lambda self: self.type_enum.value)
    homepage = property(fget=lambda self: SourcePages.get_homepage(self.page_enum))


class SourceCollection(Collection):
    def __init__(self, data: Optional[Iterable[Source]] = None, **kwargs):
        self._page_to_source_list: Dict[SourcePages, List[Source]] = defaultdict(list)

        super().__init__(data=data, **kwargs)

    def _map_element(self, __object: Source, **kwargs):
        super()._map_element(__object, **kwargs)

        self._page_to_source_list[__object.page_enum].append(__object)
        
    @property
    def source_pages(self) -> Set[SourcePages]:
        return set(source.page_enum for source in self._data)

    def get_sources_from_page(self, source_page: SourcePages) -> List[Source]:
        """
        getting the sources for a specific page like
        YouTube or musify
        """
        return self._page_to_source_list[source_page].copy()